gcc/testsuite/gdc.test/fail_compilation/diag14102.d

   1 /*
   2 TEST_OUTPUT:
   3 ---
   4 fail_compilation/diag14102.d(14): Error: cannot modify expression `-x` because it is not an lvalue
   5 fail_compilation/diag14102.d(15): Error: cannot modify expression `-(x -= 1)` because it is not an lvalue
   6 fail_compilation/diag14102.d(16): Error: cannot modify expression `-(x -= 1 -= 1)` because it is not an lvalue
   7 fail_compilation/diag14102.d(17): Error: cannot modify expression `-(x -= 1 -= 1 -= 1)` because it is not an lvalue
   8 ---
   9 */
  10
  11 int main()
  12 {
  13     int x;
  14     return -- -x;           // error: -x is not an lvalue
  15     return -- - --x;        // error: -(x -= 1) is not an lvalue
  16     return -- - -- --x;     // error: -((x -= 1 , x) -= 1) is not an lvalue
  17     return -- - -- -- --x;  // error: -((ref int __assignop1 = x -= 1 , __assignop1 = x; , __assignop1 -= 1 , __assignop1) -= 1) is not an lvalue
  18 }